ISL6442IAZ Equivalent & Substitute Parts

Part Overview

The ISL6442IAZ is a Power Management Integrated Circuit (PMIC) manufactured by Renesas Electronics Corporation, functioning as a triple-output voltage regulator with synchronous buck topology (2 outputs) and linear LDO topology (1 output). This device operates across a switching frequency range of 300kHz to 2.55MHz and is designed for surface mount applications in 24-QSOP packaging.

The ISL6442IAZ maintains Active product status with full availability (3776 pcs in stock). Identifying equivalent and substitute parts becomes necessary when addressing supply chain requirements, design revisions, or specific application constraints that may benefit from alternative component options with comparable electrical and mechanical characteristics.

Substiute Parts

ISL6442IAZ

Renesas Electronics CorporationIn Stock: 3880ISL6442IAZ Datasheet

Current PartRFQ

ISL6446AIAZ

Renesas Electronics CorporationIn Stock: 3200ISL6446AIAZ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISL6442IAZ is determined by strict alignment across the following critical parameters:

• Topology Match: Step-Down (Buck) Synchronous (2), Linear (LDO) (1) configuration
• Output Count: Exactly 3 outputs
• Supply Voltage Range: 4.5V ~ 5.5V
• Operating Temperature Range: -40°C ~ 85°C
• Package Type: 24-SSOP (0.154", 3.90mm Width)
• Mounting Configuration: Surface Mount

The ISL6446AIAZ qualifies as a parametric equivalent based on these core electrical and mechanical specifications. Variations in switching frequency range and product status do not preclude substitution when the application requirements fall within the overlapping operational parameters of both devices.

Parameter Comparison

Engineering Selection Recommendations

ISL6442IAZ (Primary Selection)

The ISL6442IAZ is the recommended primary component for new designs and ongoing production. This device maintains Active product status with confirmed inventory availability (3776 pcs in stock). The MSL rating of 2 (1 Year) provides extended shelf life and reduced moisture-related handling constraints compared to alternatives.

ISL6446AIAZ (Substitute Selection)

The ISL6446AIAZ functions as a valid parametric substitute when ISL6442IAZ availability is constrained. This device shares identical topology, output configuration, supply voltage range, operating temperature range, and package specifications. The switching frequency range of 100kHz to 2.6MHz encompasses the lower operational band of the ISL6442IAZ (300kHz minimum), ensuring functional compatibility within overlapping frequency windows.

Substitution considerations include:

• Product Status: ISL6446AIAZ is classified as Obsolete, indicating limited future availability
• Moisture Sensitivity: MSL rating of 3 (168 Hours) requires stricter moisture control during storage and handling compared to the ISL6442IAZ MSL rating of 2 (1 Year)
• Both devices maintain ROHS3 compliance and REACH Unaffected status

Frequently Asked Questions (FAQ)

Q: Can ISL6446AIAZ directly replace ISL6442IAZ in existing designs?

A: Yes, the ISL6446AIAZ qualifies as a direct parametric substitute. Both devices share identical topology (3-output configuration with 2 synchronous buck stages and 1 linear LDO), supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and 24-SSOP package specifications. The switching frequency ranges overlap, with ISL6446AIAZ covering 100kHz to 2.6MHz and ISL6442IAZ covering 300kHz to 2.55MHz.

Q: What are the key differences between these parts?

A: The primary differences are product status and moisture sensitivity. ISL6442IAZ maintains Active status with MSL 2 (1 Year), while ISL6446AIAZ is Obsolete with MSL 3 (168 Hours). The switching frequency minimum differs (300kHz vs. 100kHz), though both devices operate within overlapping frequency bands suitable for most applications.

Q: Are there any packaging or mounting differences?

A: No. Both devices use identical 24-SSOP packaging (0.154", 3.90mm Width) with surface mount configuration. PCB layout and footprint compatibility are maintained between the two parts.

Q: What does the MSL rating difference mean for component handling?

A: MSL 2 (1 Year) for ISL6442IAZ allows one year of shelf storage under controlled conditions before moisture absorption becomes a concern. MSL 3 (168 Hours) for ISL6446AIAZ limits shelf storage to 168 hours (7 days) under the same conditions. Extended storage of ISL6446AIAZ requires desiccant packaging or dry storage environments.

Q: Should ISL6446AIAZ be used for new designs?

A: ISL6442IAZ is the recommended choice for new designs due to Active product status and superior moisture handling characteristics. ISL6446AIAZ substitution is appropriate only when ISL6442IAZ supply is unavailable and design timelines permit component qualification.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both ISL6442IAZ and ISL6446AIAZ maintain ROHS3 compliance and REACH Unaffected status, meeting environmental and regulatory requirements for industrial and commercial applications.